High Pressure Check Valve

CDI Check Valves are manufactured from 316 stainless steel for instrument impulse and sampling piping systems, divided into medium-pressure CDI-C30 Check Valve and high-pressure CDI-C60 Check Valve. Available with elastic seated and floating seated structures, customizable cracking pressure ranging from 1PSI to 15PSI. End connections include double ferrule compression, NPT thread and butt weld. The Check Valve prevents reverse fluid flow to protect downstream instruments and pipelines, widely used in oil & gas, chemical processing, power generation and lab analytical equipment.

Request a Quote Downloads

Core Advantage

  • Standard 316 stainless steel body with outstanding corrosion resistance, compatible with gas, oil and liquid working media.
  • Multiple optional cracking pressure: 1PSI,5PSI,10PSI,15PSI to match varied pipeline backpressure requirements.
  • Complete end connection options: 1/8″~1″ double ferrule, NPT internal/external thread; 1/4″~1″ butt weld end.
  • Diverse sealing elastomers: FKM, NBR, EPDM, CR, Kalrez for different chemical and temperature working conditions.

Application

  • Oil & Gas: Wellhead impulse piping & field sampling lines, Check Valve avoids backflow damage to pressure transmitters and field gauges.
  • Chemical & Petrochemical: Small-bore process pipeline anti-reverse flow, Check Valve with Kalrez/FKM seal for corrosive solvent & acid dosing circuits.
  • Power Plant: Boiler steam/water sampling lines, pneumatic control cabinet instrument tubing fitted with CDI Check Valve for backflow isolation.
  • Laboratory & Analytical Instruments: Gas/liquid flow direction control on chromatography benches, compact ferrule-end Check Valve ensures leak-free lab piping.
  • Hydraulic & Compressed Air: High-pressure hydraulic test stands and compressed gas piping; CDI‑C60 high pressure Check Valve for heavy-duty hydraulic loops.

Technical Specifications

ModelMax Working PressureWorking Temp RangeSeal ConstructionOptional Cracking PressureAvailable End ConnectionsSeal Material Options
CDIC303000PSI(207bar)-23℃ ~ 190℃Elastic O-ring Seat1/5/10/15PSI1/8″~1″ Ferrule/NPT; 1/4″~1″ Butt WeldFKM, NBR, EPDM, CR, Kalrez
CDIC606000PSI(413bar)-23℃ ~ 204℃Floating Seal Ring1/5/10/15PSI1/8″~1″ Ferrule/NPT; 1/4″~1″ Butt WeldFKM, NBR, EPDM, CR, Kalrez